A black blazer and blue jeans are a nice ensemble to keep in your current rotation.
Black Blazer with Blue Jeans Warm Weather Outfits For Women In Their 30s
Dress in a black blazer and blue jeans for an everyday getup that's full of charm and character. And if you need to easily up your getup with one piece, finish off with black studded leather loafers.
Putting together a black blazer with blue jeans is a good pick for a laid-back getup. To give your overall look a more sophisticated spin, add black suede heeled sandals to the mix.